Malicious PDF — malware analysis report

Static analysis result for SHA-256 90253a08360c7988…

MALICIOUS

PDF

142.7 KB Created: 2020-09-01 11:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 657bf6f1b540f81905a28ace6b847dc5 SHA-1: 2654f7ebdf685cabbedfc451b90d7a170ebf79f1 SHA-256: 90253a08360c7988f1d1dfc7f8121c93411ff532b94825f1894d81add306be70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL that appears to be part of a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains the malicious URL. The presence of a password-protected archive lure suggests the PDF is a dropper for further malicious content.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=aarushi+talwar+supreme+court+judgement+pdf
    • https://cdn.shopify.com/s/files/1/0465/2636/5854/files/manuel_audacity_en_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2471/files/muginugowolebirurunodujan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/hp_envy_m6-_w103dx.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/naxuzodofegifetepafa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/fejax.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ddb8706259343fda196a32fad2e67d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb41f20180e6413098396a9da2b9956c.pdf
    • https://static.usrfiles.com/ugd/99afdc_2caa1f52d62f435b843be9571deee15e.pdf
    • https://static.usrfiles.com/ugd/963627_28c36ab991f243d7975728df3cbb5b83.pdf
    • https://static.usrfiles.com/ugd/f65175_fc26a420317e4d2d9e8a1d6bc54749e6.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/555992563.pdf
    • https://cdn.shopify.com/s/files/1/0452/8783/3762/files/st_silouan_the_athonite.pdf
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/natojitaxepov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3492/6495/files/39599246549.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6357/files/fofazirulajodejasitaxogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/16895062466.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/moodle_usta_20152.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b589.bin
0c23d36087db1856795c503a1271edf7ae52e52de0646b2efaf19ff15ba39d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B589 5608 bytes
font_01_sfnt_off0001c88b.bin
d111f6424058858fa6004302bc36e84d41f6d57522e23c5a1ba4a10f3c1d714b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C88B 12088 bytes
font_02_sfnt_off0001f014.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F014 16164 bytes
font_03_sfnt_off00020529.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20529 4324 bytes
font_04_sfnt_off00021329.bin
a12676add61c8945880bea5032b12da0fd6798b5ab2fd9ad920b0f7a157ac6b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21329 7044 bytes

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